TW201350351A - Compensation and check method for light quantity of light-emitting device - Google Patents
Compensation and check method for light quantity of light-emitting device Download PDFInfo
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本發明係有關一種光量檢查方法,特別是一種發光裝置之光量補償檢查方法。 The invention relates to a light quantity inspection method, in particular to a light quantity compensation inspection method of a light-emitting device.
影印機、印表機傳真機及多功能事務機係利用電子寫真技術(Electro-photography)作為列印文件的核心技術,意即藉由特定波長的光改變靜電荷(electrostatic charge)的分布而產生寫真(photographic)影像。 Photocopiers, printer fax machines, and multifunction machines use Electro-photography as the core technology for printing documents, meaning that the distribution of electrostatic charges is generated by light of a specific wavelength. Photographic image.
參照第1圖,係為彩色列印的發光二極體(LED)印表機100的示意圖。發光二極體印表機100具有分別對應於黑色、洋紅色、青色及黃色的感光鼓(Photoconductive drum)(110K、110M、110C、110Y,總稱110)、印字頭(Printing head)(120K、120M、120C、120Y,總稱120)及碳粉匣(Toner cartridge)(130K、130M、130C、130Y,總稱130)。經過佈電機構,感光鼓110表面會產生一層均勻的電荷。列印前之掃描程序係需經過曝光程序,使得欲列印的文件中的圖案像素轉換成可見光明暗資料。印字頭120中具有複數個發光二極體,其發出的光照射到感光鼓110上時,未曝光區會維持原有電位,但曝光區的電荷因曝光產生差異。曝光區的電位變化差異可吸附碳粉匣130提供的帶有正/負電荷的碳粉,藉以達到列印目的。 Referring to Fig. 1, there is shown a schematic diagram of a light-emitting diode (LED) printer 100 printed in color. The light-emitting diode printer 100 has a photosensitive drum (110K, 110M, 110C, 110Y, 110) and a printing head (120K, 120M) corresponding to black, magenta, cyan, and yellow, respectively. , 120C, 120Y, a total of 120) and Toner cartridge (130K, 130M, 130C, 130Y, a total of 130). After the power distribution mechanism, a uniform charge is generated on the surface of the photosensitive drum 110. The scanning process before printing is subjected to an exposure process, so that the pattern pixels in the file to be printed are converted into visible light and dark data. The printing head 120 has a plurality of light-emitting diodes, and when the light emitted from the printing head 110 is irradiated onto the photosensitive drum 110, the unexposed area maintains the original potential, but the electric charge in the exposed area is different due to exposure. The difference in potential change in the exposed area can adsorb the positive/negatively charged toner provided by the toner 匣130 for printing purposes.
第2圖為印刷濃度與感光鼓接受曝光的能量之關係圖。如 第2圖所示,印刷濃度與感光鼓的曝光能量成正相關。當感光鼓接受曝光的能量增加,列印出的濃度也隨之增加,藉此可列印出灰階度不同的文件內容。 Figure 2 is a graph showing the relationship between the printing density and the energy that the photosensitive drum receives exposure. Such as As shown in Fig. 2, the printing density is positively correlated with the exposure energy of the photosensitive drum. When the energy absorbed by the photosensitive drum is increased, the printed density is also increased, thereby printing the contents of the file with different gray scales.
第3圖為發光二極體印表機100的印字頭120的外觀示意圖。如第3圖所示,印字頭120包含沿一軸線140排列的複數個發光晶片122。一般而言,每一發光晶片122包含數千個直線排列的發光二極體。當發光晶片122沿軸線140排列時,發光二極體亦同樣沿軸線140排列,藉此可達到高DPI(Dots Per Inch,點每英吋)的列印解析度。例如,如欲達到1200×2400 DPI的解析度,則需要在每英吋排列有1200個發光二極體。 3 is a schematic view showing the appearance of the printing head 120 of the LED printer 100. As shown in FIG. 3, the printhead 120 includes a plurality of light emitting wafers 122 arranged along an axis 140. In general, each of the light-emitting wafers 122 includes thousands of linearly arranged light-emitting diodes. When the light-emitting wafers 122 are arranged along the axis 140, the light-emitting diodes are also arranged along the axis 140, whereby a high DPI (Dots Per Inch) printing resolution can be achieved. For example, to achieve a resolution of 1200 x 2400 DPI, it is necessary to arrange 1200 LEDs per inch.
然而,如欲使列印出的文件濃度均勻,需準確控制印字頭120中每一個發光二極體的輸出光量,以避免對應的感光鼓110的曝光區曝光過量或曝光不足。但每一發光二極體的發光特性均不盡相同。因此,每一發光晶片122必須經過測試及校正,方可裝設於印字頭120中。但每個印字頭120具有數量龐大的發光二極體,且每個彩色列印的發光二極體印表機100還包含4個印字頭120,因此,如何有效率的檢測及校正,是本領域的研究人員致力研究的課題。 However, if the density of the printed documents is to be uniform, the amount of output light of each of the light-emitting diodes in the printing head 120 needs to be accurately controlled to prevent the exposure area of the corresponding photosensitive drum 110 from being overexposed or underexposed. However, the luminescent properties of each of the light-emitting diodes are not the same. Therefore, each of the light-emitting wafers 122 must be tested and corrected before being installed in the print head 120. However, each of the printing heads 120 has a large number of light-emitting diodes, and each of the color-printed LED printers 100 further includes four printing heads 120. Therefore, how to efficiently detect and correct is Researchers in the field are dedicated to the topic of research.
鑒於以上的問題,本發明提供一種發光裝置之光量補償檢查方法,藉以解決先前技術所存在因發光裝置的發光元件數量龐大,難以對發光裝置的光輸出進行有效率的檢測及校正的問 題。 In view of the above problems, the present invention provides a light quantity compensation inspection method for a light-emitting device, thereby solving the problem that the prior art has a large number of light-emitting elements of the light-emitting device, and it is difficult to efficiently detect and correct the light output of the light-emitting device. question.
本發明之一實施例提供一種發光裝置之光量補償檢查方法,發光裝置包含複數發光元件。光量補償檢查方法包含逐一對發光元件執行下列步驟:量測發光元件於基準時間區間內輸出的原始光量;根據所測得的原始光量與基準光量產生對應發光元件的校正值;以及根據校正值調整發光元件的光輸出,使原始光量達到目標光量。 An embodiment of the invention provides a light quantity compensation inspection method for a light-emitting device, the light-emitting device comprising a plurality of light-emitting elements. The light quantity compensation inspection method includes the steps of: measuring the original light quantity outputted by the light emitting element in the reference time interval; generating a correction value of the corresponding light emitting element according to the measured original light quantity and the reference light quantity; and adjusting according to the correction value The light output of the light-emitting element is such that the amount of original light reaches the target amount of light.
根據本發明之發光裝置之光量補償檢查方法,可直接對個別的發光元件取得校正值,先評估該校正值的實施可能性,若在實施的合理範圍內才以該校正值調整該發光元件的光輸出,並對該光輸出進一步確認是否符合預期。透過二階段的檢查,可讓檢測與校正的時間縮短,而可有效率的對發光裝置進行檢測及校正。 According to the light quantity compensation inspection method of the light-emitting device of the present invention, the correction value can be directly obtained for the individual light-emitting elements, and the implementation possibility of the correction value can be evaluated first, and if the correction value is adjusted within the reasonable range of implementation, the light-emitting element is adjusted. Light output and further confirm the light output as expected. Through the two-stage inspection, the detection and correction time can be shortened, and the illumination device can be detected and corrected efficiently.
第4圖為本發明一實施例之發光裝置200之光量補償檢查電路示意圖。 FIG. 4 is a schematic diagram of a light amount compensation check circuit of the light-emitting device 200 according to an embodiment of the present invention.
如第4圖所示,發光裝置200包含發光模組210、驅動電路220及控制單元230。發光模組210包含複數個發光元件211。驅動電路220用以驅動發光元件211的光輸出。控制單元230耦接驅動電路220,用以控制發光元件211光輸出與否(點亮或關閉)以及控制輸出光250的光量。 As shown in FIG. 4, the light-emitting device 200 includes a light-emitting module 210, a drive circuit 220, and a control unit 230. The light emitting module 210 includes a plurality of light emitting elements 211. The driving circuit 220 is for driving the light output of the light emitting element 211. The control unit 230 is coupled to the driving circuit 220 for controlling the light output of the light emitting element 211 (lighting or turning off) and controlling the amount of light of the output light 250.
在本實施例中,發光元件211為發光閘流體,發光裝置 200為印表機中的印字頭,但本發明實施例非以此為限,發光元件211亦可為發光二極體等光輸出元件,發光裝置200亦可適用於傳真機或影印機等成像裝置的曝光部件。並且,發光模組210可包含至少一前述發光晶片122,而具有複數個直線排列的發光元件211。 In this embodiment, the light-emitting element 211 is a light-emitting thyristor, and the light-emitting device 200 is a printing head in the printer, but the embodiment of the invention is not limited thereto, and the light-emitting element 211 can also be a light output element such as a light-emitting diode, and the light-emitting device 200 can also be applied to imaging such as a facsimile machine or a photocopying machine. The exposed part of the device. Moreover, the light-emitting module 210 can include at least one of the foregoing light-emitting chips 122, and has a plurality of light-emitting elements 211 arranged in a line.
第5圖為本發明一實施例之驅動電路220的電路示意圖。第6圖為本發明一實施例之驅動電路220接收的時脈訊號示意圖。 FIG. 5 is a circuit diagram of a driving circuit 220 according to an embodiment of the present invention. FIG. 6 is a schematic diagram of a clock signal received by the driving circuit 220 according to an embodiment of the present invention.
如第5圖所示,驅動電路220包含發光閘流體(T1、T2、T3等,總稱T)、二極體(D1、D2、D3等,總稱D)、負載電阻(R1、R2、R3等,總稱R)及緩衝器(B1、B2)。 As shown in FIG. 5, the driving circuit 220 includes a light-emitting thyristor (T1, T2, T3, etc., generally referred to as T), a diode (D1, D2, D3, etc., collectively referred to as D), and a load resistor (R1, R2, R3, etc.) , collectively referred to as R) and buffers (B1, B2).
發光閘流體T具有閘極、陰極與陽極。當閘極與陰極間為順向偏壓且電壓差超過擴散電壓時,發光閘流體T點亮。與一般閘流體相同的是,發光閘流體T開啟後(即點亮),閘極電位與陽極電位近乎相同,當閘極與陰極間的電位差回歸至零伏特時,發光閘流體T才關閉(即不發光)。 The luminescent thyristor T has a gate, a cathode and an anode. When the gate and the cathode are forward biased and the voltage difference exceeds the diffusion voltage, the light-emitting thyristor T is lit. The same as the general thyristor, after the thyristor T is turned on (ie, illuminates), the gate potential is almost the same as the anode potential, and the thyristor T is turned off when the potential difference between the gate and the cathode returns to zero volts ( That is, no light).
每一個發光閘流體T的閘極經由一相對應的二極體D耦接至另一個發光閘流體T(如發光閘流體T1經由二極體D1耦接至發光閘流體T2)。每一個發光閘流體T的陰極間隔地經由緩衝器(B1或B2)對應耦接訊號ψ11與ψ12或訊號ψ21與ψ22。例如,發光閘流體T1的陰極經由緩衝器B1耦接訊號ψ11與ψ12;發光閘流體T2的陰極經由緩衝器B2耦接訊號ψ11 與ψ12。每一個發光閘流體T的閘極與對應的二極體D的耦接處還各自經由一對應的負載電阻R而耦接至電壓VGA(如發光閘流體T1的閘極與二極體D1的耦接處經由負載電阻R1而耦接至電壓VGA)。 The gate of each of the light-emitting thyristors T is coupled to the other light-emitting thyristor T via a corresponding diode D (eg, the light-emitting thyristor T1 is coupled to the light-emitting thyristor T2 via the diode D1). The cathode of each of the illuminating thyristors T is coupled to the signals ψ 11 and ψ 12 or the signals ψ 21 and ψ 22 via the buffers (B1 or B2). For example, the cathode of the illuminating thyristor T1 is coupled to the signals ψ 11 and ψ 12 via the buffer B1; the cathode of the illuminating thyristor T2 is coupled to the signals ψ 11 and ψ 12 via the buffer B2. The coupling of the gate of each of the light-emitting thyristors T and the corresponding diode D is also coupled to the voltage V GA via a corresponding load resistor R (such as the gate and diode D1 of the light-emitting thyristor T1). The coupling is coupled to the voltage V GA via the load resistor R1.
其中,發光閘流體T1的閘極還耦接訊號ψ S。二極體D的陽極端耦接鄰近訊號ψ S的相鄰的發光閘流體T,其陰極端耦接相鄰的另一發光閘流體T。例如,二極體D1的陽極端耦接發光閘流體T1,其陰極端耦接發光閘流體T2。 The gate of the thyristor T1 is also coupled to the signal ψ S. The anode end of the diode D is coupled to the adjacent light-emitting thyristor T adjacent to the signal ψ S, and the cathode end thereof is coupled to the adjacent another light-emitting thyristor T. For example, the anode end of the diode D1 is coupled to the light-emitting thyristor T1, and the cathode end thereof is coupled to the light-emitting thyristor T2.
訊號ψ11、ψ12、ψ21、ψ22、ψ S以及電壓VGA係由控制單元230所提供,藉以輸出如第6圖所示之時脈訊號,以控制每一個發光閘流體T的點亮時間(如發光閘流體T1的點亮時間t1、發光閘流體T2的點亮時間t2及發光閘流體T3的點亮時間t3)。也就是說,控制單元230可經由驅動電路220控制每一個發光閘流體T依序點亮一段時間。 The signals ψ 11 , ψ 12 , ψ 21 , ψ 22 , ψ S and voltage V GA are provided by the control unit 230 to output a clock signal as shown in FIG. 6 to control the point of each of the light-emitting thyristors T The lighting time (such as the lighting time t1 of the light-emitting thyristor T1, the lighting time t2 of the light-emitting thyristor T2, and the lighting time t3 of the light-emitting thyristor T3). That is, the control unit 230 can control each of the light-emitting thyristors T to be sequentially illuminated for a period of time via the driving circuit 220.
在此,第5圖所示的驅動電路220僅為示例,本發明實施例非以此為限,亦可經由其他驅動電路220的電路結構搭配控制單元230,使得每個發光元件211可依序點亮一段時間。 The driving circuit 220 shown in FIG. 5 is only an example, and the embodiment of the present invention is not limited thereto, and may be matched with the control unit 230 via the circuit structure of the other driving circuit 220, so that each of the light emitting elements 211 can be sequentially arranged. Light up for a while.
復參照第4圖,光電轉換單元300沿一方向移動而逐一對發光元件211量測其輸出光量。於此,光電轉換單元300可為電荷耦合元件(CCD)、互補式金屬氧化物半導體(CMOS)或其他光電轉換器。光電轉換單元300用以接收發光元件211發出的光,並將其轉換為電訊號,使得電訊號的電壓或電流可 對應接收到的光強度對應變化。 Referring to Fig. 4, the photoelectric conversion unit 300 is moved in one direction to measure the amount of output light by a pair of light-emitting elements 211. Here, the photoelectric conversion unit 300 may be a charge coupled device (CCD), a complementary metal oxide semiconductor (CMOS), or other photoelectric converter. The photoelectric conversion unit 300 is configured to receive the light emitted by the light-emitting element 211 and convert it into an electrical signal, so that the voltage or current of the electrical signal can be Corresponding changes corresponding to the received light intensity.
在一些實施例中,藉由前述驅動電路220與控制單元230輸出的時脈訊號,可控制發光元件211點亮與否以及其輸出的光量。因此,光電轉換單元300可配合特定發光元件211點亮的期間而移動至其前方,以量測其輸出的光量。並且,光電轉換單元300接續的移動至下一個發光元件211前方,以於下一個發光元件211點亮期間量測其輸出的光量。 In some embodiments, by the clock signal outputted by the driving circuit 220 and the control unit 230, the light-emitting element 211 can be controlled to be illuminated or not. Therefore, the photoelectric conversion unit 300 can be moved to the front thereof in conjunction with the period in which the specific light-emitting element 211 is lit to measure the amount of light that it outputs. Further, the photoelectric conversion unit 300 is successively moved to the front of the next light-emitting element 211 to measure the amount of light outputted during the lighting of the next light-emitting element 211.
在一實施例中,光電轉換單元300耦接控制單元230,由控制單元230接收光電轉換單元300輸出的電訊號,並根據電訊號的電壓或電流轉換為發光元件211輸出的光強度。接著,控制單元230可將第一時間至第二時間內的光強度予以積分,而取得發光元件211輸出的光量。也就是說,本發明的實施例中所述的光量對應於發光元件211於第一時間至第二時間內輸出的光強度的積分值。 In an embodiment, the photoelectric conversion unit 300 is coupled to the control unit 230. The control unit 230 receives the electrical signal output by the photoelectric conversion unit 300, and converts the light intensity outputted by the light-emitting element 211 according to the voltage or current of the electrical signal. Next, the control unit 230 may integrate the light intensity from the first time to the second time to obtain the amount of light output by the light-emitting element 211. That is, the amount of light described in the embodiment of the present invention corresponds to the integrated value of the light intensity output by the light-emitting element 211 from the first time to the second time.
第7圖為本發明一實施例之發光裝置200之另一光量補償檢查電路示意圖。 FIG. 7 is a schematic diagram of another light quantity compensation check circuit of the light-emitting device 200 according to an embodiment of the present invention.
參照第7圖,在一實施例中,光電轉換單元300輸出的電訊號為影像訊號,且耦接影像處理裝置400(如可程式化邏輯電路(Field Programmable Gate Array,FPGA)或電腦)。由影像處理裝置400分析影像訊號而取得發光元件211輸出光250的光量。也就是說,影像處理裝置400根據影像訊號中受到發光元件211的光輸出而形成的亮點的尺寸及灰階度等參 數,判斷光電轉換單元300在第一時間至第二時間內接收到來自發光元件211的累積光量。影像處理裝置400並耦接控制單元230,以提供光量分析結果予控制單元230。 Referring to FIG. 7, in an embodiment, the electrical signal outputted by the photoelectric conversion unit 300 is an image signal, and is coupled to the image processing device 400 (such as a Field Programmable Gate Array (FPGA) or a computer). The image processing device 400 analyzes the image signal to obtain the amount of light output from the light-emitting element 211. That is, the image processing device 400 determines the size and gray scale of the bright spot formed by the light output of the light-emitting element 211 in the image signal. The number is judged to receive the cumulative amount of light from the light-emitting element 211 from the first time to the second time. The image processing device 400 is coupled to the control unit 230 to provide a light quantity analysis result to the control unit 230.
第8圖為本發明一實施例之光量補償檢查流程圖。以第4圖或第7圖所示之光量補償檢查電路執行如第8圖所示之流程,可對發光裝置200的各個發光元件211逐一進行光亮量測與校正。 Figure 8 is a flow chart of the light amount compensation check according to an embodiment of the present invention. The light amount compensation check circuit shown in Fig. 4 or Fig. 7 performs the flow shown in Fig. 8 to perform light measurement and correction on the respective light-emitting elements 211 of the light-emitting device 200 one by one.
參照第4圖及第8圖。首先,於初始化發光裝置200及光電轉換單元300後,將光電轉換單元300移動至直線排列的發光元件211的起始端,而位於第一個發光元件211前方(步驟S610)。接著,對發光元件211量測其於一基準時間區間內(如100微秒(μs))輸出的原始光量,即由驅動電路220及控制單元230控制發光元件211在基準時間區間內點亮,而由控制單元230或影像處理裝置400依據光電轉換單元300提供的電訊號轉換為發光元件211輸出的原始光量(步驟S620)。 Refer to Figures 4 and 8. First, after the light-emitting device 200 and the photoelectric conversion unit 300 are initialized, the photoelectric conversion unit 300 is moved to the start end of the linearly arranged light-emitting elements 211, and is located in front of the first light-emitting element 211 (step S610). Next, the original light quantity outputted by the light-emitting element 211 in a reference time interval (for example, 100 microseconds (μs)) is measured, that is, the driving circuit 220 and the control unit 230 control the light-emitting element 211 to light up in the reference time interval. The electric signal supplied from the control unit 230 or the image processing device 400 according to the photoelectric conversion unit 300 is converted into the original light amount output from the light-emitting element 211 (step S620).
於步驟S620取得發光元件211輸出的原始光量後,根據原始光量與一基準光量產生對應發光元件211的校正值(步驟S630)。所述基準光量為欲使每個發光元件211一致輸出的光量。接著,執行步驟S640,根據步驟S620取得的校正值調整發光元件211的光輸出,使原始光量達到目標光量。 After the original light amount output from the light-emitting element 211 is obtained in step S620, a correction value corresponding to the light-emitting element 211 is generated based on the original light amount and a reference light amount (step S630). The reference light amount is an amount of light to be uniformly outputted by each of the light-emitting elements 211. Next, step S640 is executed to adjust the light output of the light-emitting element 211 based on the correction value obtained in step S620 so that the original light amount reaches the target light amount.
經過步驟S620至步驟S640而完成單一發光元件211的校正之後,進入步驟S650,判斷所有發光元件211是否均校正 完成。若為是,則結束此流程;若為否,則移動光電轉換單元300至相鄰之次一個發光元件211前方,例如,校正完第一個發光元件211之後,則移動至第二個發光元件211前方(步驟S660)。於步驟S660後,返回步驟S620以繼續校正該次一個發光元件211。 After the correction of the single light-emitting element 211 is completed through steps S620 to S640, the process proceeds to step S650, and it is determined whether all of the light-emitting elements 211 are corrected. carry out. If yes, the process is ended; if not, the photoelectric conversion unit 300 is moved to the front of the adjacent one of the light-emitting elements 211, for example, after the first light-emitting element 211 is corrected, then moved to the second light-emitting element. The front side of 211 (step S660). After step S660, the process returns to step S620 to continue to correct the next one of the light-emitting elements 211.
在一些實施例中,於步驟S610之前,可預先點亮所欲量測的發光元件211,並關閉其他發光元件211,使得在執行步驟S610的期間,僅有所欲量測的發光元件211點亮。 In some embodiments, before step S610, the light-emitting elements 211 to be measured may be pre-lighted, and the other light-emitting elements 211 are turned off, so that during the execution of step S610, only the light-emitting elements 211 to be measured are clicked. bright.
在一些實施例中,前述校正值為發光元件211的點亮持續時間,而於步驟S640中,控制單元230可將點亮發光元件211的基準時間區間改為點亮持續時間(如90微秒),以調整原始光量為目標光量。於此,可根據基準光量與原始光量之比值實質等同於點亮持續時間與基準時間區間之比值的關係,而取得點亮持續時間的校正數值。 In some embodiments, the aforementioned correction value is the lighting duration of the light-emitting element 211, and in step S640, the control unit 230 may change the reference time interval of the lighting the light-emitting element 211 to the lighting duration (eg, 90 microseconds). ), to adjust the amount of original light as the target amount of light. Here, the correction value of the lighting duration can be obtained based on the relationship between the reference light amount and the original light amount substantially equivalent to the ratio of the lighting duration to the reference time interval.
在一些實施例中,如第4圖所示,發光裝置200更包含儲存單元240。控制單元230耦接儲存單元240,以將校正值儲存於儲存單元240中。據此,在每次發光裝置200初始化時,可先讀取儲存單元240內儲存的校正值。當需點亮發光元件211時,根據發光元件211所各自對應的校正值點亮,使其每個發光元件211的輸出光量一致。藉此,使用校正值輸出光的發光裝置200曝光一感光元件(如感光鼓)時,感光元件的每個受光位置均可受到相同的光量。 In some embodiments, as shown in FIG. 4, the light emitting device 200 further includes a storage unit 240. The control unit 230 is coupled to the storage unit 240 to store the correction value in the storage unit 240. Accordingly, each time the light-emitting device 200 is initialized, the correction value stored in the storage unit 240 can be read first. When the light-emitting elements 211 are to be turned on, they are lit according to the respective correction values of the light-emitting elements 211, so that the output light amount of each of the light-emitting elements 211 is uniform. Thereby, when the light-emitting device 200 that outputs light using the correction value exposes a photosensitive member (such as a photosensitive drum), each light-receiving position of the photosensitive member can receive the same amount of light.
在一些實施例中,於步驟S603之前,還可預先儲存基準光量、原始光量及校正值之對照表於儲存單元240。於步驟S602量測到的原始光量後,可以控制單元230讀取儲存單元240內的對照表,藉此,可根據基準光量與所量測到的原始光量取得對照表中的校正值。 In some embodiments, a comparison table of the reference light amount, the original light amount, and the correction value may be stored in the storage unit 240 before the step S603. After the original amount of light measured in step S602, the control unit 230 can read the comparison table in the storage unit 240, whereby the correction value in the comparison table can be obtained according to the reference light amount and the measured original light amount.
在一些實施例中,校正值係對應發光元件211的發光亮度。詳細地說,校正值可為發光元件211的驅動電壓或驅動電流,藉由調整驅動電壓或驅動電流來調整發光元件211的發光亮度,使得發光元件211的輸出光量對應改變。 In some embodiments, the correction value corresponds to the luminance of the light emitted by the light emitting element 211. In detail, the correction value may be the driving voltage or the driving current of the light-emitting element 211, and the light-emitting luminance of the light-emitting element 211 is adjusted by adjusting the driving voltage or the driving current so that the output light amount of the light-emitting element 211 is correspondingly changed.
第9圖為本發明一實施例之另一光量補償檢查流程圖。 Figure 9 is a flow chart of another light amount compensation check according to an embodiment of the present invention.
如第9圖所示,在前述步驟S640之前,還包含步驟S731,判斷校正值是否超出合理範圍。依據發光裝置200的需求條件,設定一校正範圍,若由步驟S630所得出的校正值超出該校正範圍,則輸出表示發光裝置200為異常品的輸出訊號(步驟S732),反之,則進入步驟S640。 As shown in FIG. 9, before the foregoing step S640, step S731 is further included to determine whether the correction value exceeds a reasonable range. According to the demand condition of the light-emitting device 200, a correction range is set. If the correction value obtained in step S630 exceeds the correction range, an output signal indicating that the light-emitting device 200 is an abnormal product is output (step S732), otherwise, the process proceeds to step S640. .
在前述步驟S640之後,更包含步驟S741,檢測目標光量與基準光量是否實質相同。若為相同,則進入步驟S650,反之,則輸出表示發光裝置200為正常品的輸出訊號(步驟S751)。 After the foregoing step S640, further including step S741, it is detected whether the target light amount and the reference light amount are substantially the same. If it is the same, the process goes to step S650. Otherwise, the output signal indicating that the light-emitting device 200 is a normal product is output (step S751).
在前述步驟S650中,若執行完所有發光元件211的校正,則進入步驟S751,輸出表示發光裝置200為正常品的輸出訊號。 In the above step S650, if the correction of all the light-emitting elements 211 is performed, the process proceeds to step S751, and an output signal indicating that the light-emitting device 200 is a normal product is output.
綜上所述,根據本發明之發光裝置200之光量補償檢查方法,對個別的發光元件取得校正值,先評估該校正值的實施可能性,若在實施的合理範圍內才以該校正值調整該發光元件的光輸出,並對該光輸出進一步確認是否符合預期。透過二階段的檢查,可讓檢測與校正的時間縮短,而可有效率的對發光裝置200進行檢測及校正。 In summary, according to the light quantity compensation inspection method of the light-emitting device 200 of the present invention, the correction value is obtained for the individual light-emitting elements, and the implementation possibility of the correction value is first evaluated, and if the correction value is adjusted within the reasonable range of implementation, The light output of the light-emitting element is further confirmed to the light output as expected. Through the two-stage inspection, the time for detection and correction can be shortened, and the illumination device 200 can be detected and corrected efficiently.
100‧‧‧發光二極體印表機 100‧‧‧Lighting diode printer
110K、110M、110C、110Y‧‧‧感光鼓 110K, 110M, 110C, 110Y‧‧‧Drum
120、120K、120M、120C、120Y‧‧‧印字頭 120, 120K, 120M, 120C, 120Y‧‧‧ print head
122‧‧‧發光晶片 122‧‧‧Lighting chip
130K、130M、130C、130Y‧‧‧碳粉匣 130K, 130M, 130C, 130Y‧‧‧ toner magazine
140‧‧‧軸線 140‧‧‧ axis
200‧‧‧發光裝置 200‧‧‧Lighting device
210‧‧‧發光模組 210‧‧‧Lighting Module
211‧‧‧發光元件 211‧‧‧Lighting elements
220‧‧‧驅動電路 220‧‧‧ drive circuit
230‧‧‧控制單元 230‧‧‧Control unit
240‧‧‧儲存單元 240‧‧‧ storage unit
250‧‧‧輸出光 250‧‧‧Output light
300‧‧‧光電轉換單元 300‧‧‧ photoelectric conversion unit
400‧‧‧影像處理裝置 400‧‧‧Image Processing Unit
B1、B2‧‧‧緩衝器 B1, B2‧‧‧ buffer
D1、D2、D3‧‧‧二極體 D1, D2, D3‧‧‧ diode
R1、R2、R3‧‧‧負載電阻 R1, R2, R3‧‧‧ load resistor
T1、T2、T3‧‧‧發光閘流體 T1, T2, T3‧‧‧ illuminating thyristor
t1、t2、t3‧‧‧點亮時間 T1, t2, t3‧‧‧ lighting time
ψ11、ψ12、ψ21、ψ22、ψ S‧‧‧訊號 ψ 11 , ψ 12 , ψ 21 , ψ 22 , ψ S‧‧‧ signal
VGA‧‧‧電壓 V GA ‧‧‧ voltage
第1圖為彩色列印的發光二極體印表機的示意圖。 Figure 1 is a schematic illustration of a color-printed LED printer.
第2圖為吸附碳粉濃度與感光鼓的曝光量之關係圖。 Fig. 2 is a graph showing the relationship between the adsorbed toner concentration and the exposure amount of the photosensitive drum.
第3圖為發光二極體印表機的印字頭的外觀示意圖。 Fig. 3 is a schematic view showing the appearance of a printing head of a light-emitting diode printer.
第4圖為本發明一實施例之發光裝置之光量補償檢查電路示意圖。 FIG. 4 is a schematic diagram of a light amount compensation check circuit of a light-emitting device according to an embodiment of the present invention.
第5圖為本發明一實施例之驅動電路的電路示意圖。 FIG. 5 is a circuit diagram of a driving circuit according to an embodiment of the present invention.
第6圖為本發明一實施例之驅動電路接收的時脈訊號示意圖。 FIG. 6 is a schematic diagram of a clock signal received by a driving circuit according to an embodiment of the present invention.
第7圖為本發明一實施例之發光裝置之另一光量補償檢查電路示意圖。 FIG. 7 is a schematic diagram of another light quantity compensation check circuit of the light-emitting device according to an embodiment of the present invention.
第8圖為本發明一實施例之光量補償檢查流程圖。 Figure 8 is a flow chart of the light amount compensation check according to an embodiment of the present invention.
第9圖為本發明一實施例之另一光量補償檢查流程圖。 Figure 9 is a flow chart of another light amount compensation check according to an embodiment of the present invention.
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